Malaysia 's Prime Minister Tunku had initially rejected Agree_or_refuse_to_act Lee Kuan Yew 's proposal for a merger Cause_to_amalgamate due to the fear of communist insurgency in Singapore and the large number of ethnic Chinese in Singapore which might outnumber the Malay population in Malaysia .

In 1956 , after Lim Yew Hock replaced Change_of_leadership David Marshall as Chief Minister of Singapore , he began Process_start to take Action tough Confronting_problem measures to suppress Preventing_or_letting communist activities with the support Supporting of the British Governor and Commissioner of Police .

In September , Lim Yew Hock deregistered and banned Preventing_or_letting two pro-communist organisations : the Singapore Women ’ s Association ( SWA ) and the Chinese Musical Gong Society .